Insulator.



UNITED sTATEs PATENT oEEIoE. *WILLIAM SCHAAKE, or PITTSBURGH, PENNSYLVANIA, AssIGNoE To WEsTINGHo-Usis" f ELECTRIC & MANUFACTURING COMPANY, A CORPORATION or PENNSYLVANIA. 1"

INsULA'Ioa.

To'aZZ whom it may concern y Be it known that I, WILLIAM SQHAAKE, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of`Iennsylvania-,- have invented a new and useful Improvement in Insulators,y

- of whichlthe following is a specification.

My invention relates to insulators for electrical conductors, and it has for its object to provide a conductor-supporting means to be used with insulators ofthe above designated type.

Such insulators as have heretofore been' proposed have employed some form of cablesecuring clamp which retained the cable in a fixed position relative to the insulator. In such insulators, an' excessive strain is imposed upon the insulating member and the cable is subjected yto a sharp bend whenever the insulator or clamp Vis slightly out of alinement with the supported conductor.

According to my invention, I provide an insulator of the above designa-ted type with a cable-securing means which enables the clamps to swing into .alinement with the' supported conductor. and thereby yprevent abnormal strains Afrom being imposed upon the insulating. member. Furthermore, a device constructed in accordance with vmy invention permits the same kind ofinsulator .to be used at points where the conductor line changes in directionan'd along the straight portions of the line.

conductor Szby means of laplurality of' 'clamps/4. The insulator 1 4may be of any familiar-.type that-.is employed for structures of the above designated class. The

by cement 5, or othersecuring '50 cap member 2 issecured to the means, and

is provided with an annular rib C and a plurality vof cable-pSltioning-.lugs 7 The rib 6is interrupted to provide .a' purpose to of 'a cross-section, preferably of approxi' anvop'ening 8 for be hereinaftersejt forth and -is mately circular form', that will suitably in- Specication of Letters Patent. y

that is provided" with "av insulator 1 p .Patented Mana, 1919.

Application filed April 5, 1917. yserial Nq. 159,956'.

terlock with `a pf'irtiongft). of the clamp`- 4. The'lugs 7 extend upwardly from the top of' the cap A2 lto provide afgroove thereacross having a restricted centralfportiOnthatis 1 of just sutlicierit siz'e to. 'snugly'admit the', supported cable yand have vdivergent ends' which provide' a materially wider, grooveat the rim of ythe cat-p2. Each clamp'4 .has al recessl therein for grippingfthesipported conductor 3' and arece'ss-in the portion 9 that recessand 'is adapted to be slidably mounted upon, 'and interlocked with, the r'ibl6 to'hold Y the cable in place. The recessed portion 9 is adapted to fit# thel -rib 6 .with suiiicient loose- "is substantially .at'right angles to 4the first f ness to permit a considerable degree-of movea' .horizontal plane v `without releasing cableL. --Fig'l illustrates the approximate'v position that one of the clamps 4 assumes when the cable is caused to make a sharp. bend, and Fig. 2 shows the positions-taken by the cable and clamps when there isa co1i` siderable degree of sag between v'supporting points. A bolt 10y is employed for securing. each clamp' 4 toy the conductor 43. i

Such anI insulator as I hav'elhereiny de scribed is assembled by 'sliding the recessed -portion .9 of 'the clamp .4 over'the rib 6 through' the openingS and around to yits' op `ment of the clamps 4 inboth ayertical ailild t e erativeposition upon the rib. The cable lthe vgroove across the inthen positioned in sulator and 'gripped' in the clamps tightening the 'bolts 10. j j It will beunderstood that,if the portions '11and 12 of the supported conductor. are

notv vi'n alinement during operation, 'the' clamps 4 will slide ,along the rib .Gland adjust themselves to alinement with the corresponding portions of the supported conduc tor. The flared ends 13 of the upwardly projecting lugs 7jprevent the clamps from ever swinging ,around the rib 6 to such a de grec that they will'reach the opening 8 and become disengaged from the rib. Furthermore', the Vmovability of thefciamp's upon the rib Gprevent's sharp kinks from being v formed. in: the supported conductor at the points wher'e the conductor leaves the insulator. v

While I have shown and described a particular form of my invention, changes may -be ei'ected' therein, Without departing from the spirit and lscope thereof, as set forth in the appended claims.

l claim as my invention:

. 1.-;Aninsulator comprising a plurality of upwardly extending cablefpositioninglugs,

"for positioning a Wire at insulator, and clamps adaptedlto engage said Wire and be slidably held upon said rib.

4. insulator comprising a cap having a rib, clamps adapted ,to be slidably positioned on' saidrib' and vprovided with Wire-` secliring ]aws, and means forpositioning the Wire at the lator; .v v 45. The combination with an insulator hav' inga wire-receiving grooveand a rib center of 'the top of said insu- ,to'hold .the'vvire' in, place on said insulator. *6. The combination With an insulator constructed to lreceive, a Wire and having an i outer'rb, of' a clamp 'adapted to be slidablyv said Wire tdhold'the same 'in place.

The combination with ali-insulator, of a cap lforsaid sulator'having' a groove there? v v scribed my name across and a rib, said,groove having' a restricted centraly portion, Asaid 'ri'b 'being in- .terrupted at one side of. the cap, a clam-p lcable-.positioning lugs,l

thecenter of the .plurality received by said rib the interruption in said rib being for the of a clamp'slidably li'eldonsaid rilb and adapted adapted to be applied to thef'ib through the interruption space and ltube rigidly secured to va, cable.v

8. The combination With/1 an insulator, of a cap member provided VWith a-,riib extending Iiearly around the periphery thereof, and clamps adapted to lbe slidably secured upon said rib, said rib and clamps serving to secure an electrical conductor to said. cap and the interruption in said rib being for the purpose of permitting the rib to receive said clamps. j I- 9. An insulator comprising a 'cap' having a ring shaped rib that` is interrupted at one side, a plurality of upwardly-extending lugs on' said cap for positioning acaible,l and a of clamps adapted to be slidably and to. grip the cable,

purpose ofA permitt ng said rib to receive said clamps. .i

10. An'insulator comprising a plurality of cable-positioning lugs, an annular rib hav-4 ing .an opening at one side', and clamps adapted to be slidably receiv'edby said rib through said opening and to grip said cable,

the engagement of said cable and said lugs being adapted to prevent the disengagement of said clamps. and said ribA after said clamps are positioned on said cable. l 'In testimony whereof, I have hereunto sub- WILLIAM SCHAAKE.

this 26th day of March p 

